Dan, here's the latest: I thought all was well but it crashed again upon manually checking mail on TB this afternoon.

Yesterday: After updating the drivers I opened FF and GibbsCAM, monkeyed with them, left it alone with FF tabs set to refresh, and TB checking email regularly, all was well after a couple of hours.

Then I streamed radio for a while (which is what I was doing the first time it crashed), and no problems. So it ran for probably three hours and zero issues.

Today: I ran the RAM test for 3 hours, showed no errors.

Although it had already been open for a while, I checked for new mail manually and instantly got the BSOD again.

I DLd the "Blue Screen Viewer" from that link you posted yesterday and got a report as to what happened but it's all jibberish to me, except for one item. Here is the .txt file report, note the item I made red. What do I do with this info? I did Google it and got a bunch of stuff (could be virus, or related to W updates, etc. etc. Fixing it is beyond my knowledge). Crashes have ONLY happened when opening TB, or like today when I checked mail manually with the button on the top left corner.

A follow-up: Good news, so far anyway. The PC has been running all day, every day, since Monday morning -- Tbird, FF, CAM program all running and no issues.

I called a buddy of mine, who I haven't talked to in some time although we don't live that far apart. He's been working on computers since the '70s and has helped me out too many times to count. I told him everything, and sent the crash reports to him, which he found interesting but didn't agree that the supposed problem file (previous post ^ in red) was actually a driver -- because I didn't have any hardware problems, nor any new HW installs. Opening Tbird was making it crash but it's only software, of course.

He asked me some questions about my new PC, like what I had for anti-virus and/or malware programs. When I said it came with McAfee and it was active, he said shut it off and any third-party anti-virus programs, which I didn't have. And make sure Windows Defender was all active and running properly -- which it was.

I uninstalled McAfee, which I've never heard much good about, (it took two tries plus two registry scans) and I also stopped "Malwarebytes" from doing automatic scans. That was Monday morning and everything has been fine since.

Seems like the problem is solved, or so I hope. At any rate, thanks Dan and others who were a big help. I realized that we were getting away from what this forum is supposed to be for -- but you still helped anyway and didn't tell me to get lost!

Thanks again, and maybe all this will help someone else in the future. If I don't post back, you'll know the problem was solved.